CVE-2026-50084 is a missing-authorization flaw in the Aqara Cloud Production API at open-cn.aqara.com/v3.0/open/api. According to the provided content, the API authenticates requests using a developer Appid/token and an MD5-based request-signature scheme, but fails to enforce proper account-level authorization on user-scope endpoints. As a result, any valid developer token/Appid is accepted as sufficient authorization to perform API calls against arbitrary Aqara accounts rather than being restricted to the account it should be associated with. This is described as a cross-account access control failure affecting the production API.
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